Furnace



(No Model.)

M. E. ALLEY FURNACE.

No. 431,928. Patented July 8, 1890.

UNITED STATES PATENT OFFICE.

MOSES E. ALLEY, OF MADISON, WISCONSIN.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 431,928, dated July 8, 1890.

Application filed November 13, 1889. Serial No. 330,183. (No model.)

To all whom it may concern:

Be it known that I, MosEs E. ALLEY, a cit-izen of the United States, residing at Madison, in the county of Dane and State of VVisconsin, have invented certain new and useful Improvements in Furnaces; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in furnaces in which superheated steam is applied as an additional source of heat. It consists of the device hereinafter described and claimed.

The invention is illustrated in the accompanying drawings, in which- Figure 1 is a front elevation, partly in section, and Fig. 2 is a longitudinal section on line so a: of Fig. 1.

Referring to the drawings, A A are the outer walls of a furnace, on which are supported a boiler or hot-air chamber A.

B B are two retorts filled with metal scraps b and connected by a communicating pipe 0. These retorts are supported on inner converging walls D D by means of brackets E.

. F is a pipe or cylinder connected to the heads of the retorts B B.

G is a pipe leading from a water-tank II and provided with a stop-cock I and a checkvalve K. It extends into one of the communieating retorts B.

L is a pipe extending from one of the re torts into the pipe or cylinder F, and M is a short steam-jet pipe leading from the pipe F to a space over the bed of fuel N. The waterpipe G isprovided with a perforation g, which is located directly over the pipe M to permit the trickling of water on said pipe, and thus moderate the intense heat to which the steampipe is subjected, thereby preventing the closing of the same by expansion. The fuel is thrown in onto a grate O, and ignition of the same is increased by the vent-holes P. The object of the inner convergingwalls, besides supporting the retorts, is to confine and concentrate the heat upon'the retorts and steam-cylinder, and also upon the steam itself after its admission to the fire-chamber.

The operation of the device is as follows: \Vater is admitted from the tank or other suitable source of supply H by pipe G to one of the heated retorts B. There the water, passing around and over the metal scraps, is converted into steam. Thence the steam is conducted through pipe 0 into the retort B, whereit is superheated, thereby greatly increasing the heating capacity of the furnace. From the retort B the superheated steam passes by small pipe L into the larger pipe or cylinder F. This pipe or cylinder F, by reason of its size, affords a more extended steam-space and protects the nozzle M, leading from the retort B. From the pipe F the superheated steam passes into the fire-space R over the bed of ignited fuel, where, uniting with the products of combustion, an intense heat is produced.

In order to regulate and control the supply of water to the retorts, I place the checkvalve K in the pipe G, which, when the water in the retorts is converted into steam,is closed by the back-pressure of the steam, and the supply of water is thus cut off, and at the same time the back-flow of water or steam to the water-supply tank is prevented. Thus a continuous, successive, and automatic supply of steam is produced as fast and no faster than the water is converted into steam.

Having thus describedmy invention, what I claim is 1. In a steam generating and superheating furnace, the combination, with a heatingchamber, of a retort in which steam is generated, a communicating retort into which the generated steam is led and superheated, an additional communicating cylinder or pipe located below said retorts and provided with a jet-pipe for discharging the steam into the eating retort supported by said inner Walls, in In testimony whereof I affix my signature in combination with a suitable Water-supply, a presence of two Witnesses. pipe leading to one chamber of the double retort, ancla discharge communicating pipe or MOSES E. ALLEY. pipes leading from the other of said retort- Witnesses: chambers to the space above the fuel below HENRY E. COOPER,

said retort, substantially as described. J 0s. H. BLACKWOOD. 

